I published a Claude Code cheatsheet at the end of March. Less than four weeks later it is already incomplete: Opus 4.7 shipped on April 16, Computer Use landed in the CLI, Auto Mode went GA on Max, seven new slash commands appeared (and two were removed), five hook updates arrived, and the Desktop app was redesigned on April 14. Between v2.1.83 and v2.1.101, Anthropic shipped roughly thirty releases in five weeks.
So I republished an April 2026 edition — same visual architecture as the March version, rewritten to match every recent addition, and using the blog palette (dark background, gold accent) instead of the original Reddit theme.
The cheat sheet
The March version stays available for reference: EN · FR.
Items with a gold NEW badge shipped since late March 2026. Items tagged REMOVED are commands that were retired.
What’s covered
14 sections instead of 13 in the March version (the new row groups Auto Mode, Models & Effort, and Platforms):
| Section | Coverage |
|---|---|
| Keyboard Shortcuts | ~30 shortcuts, 17 contexts, Vim visual mode |
| Slash Commands | 60+ commands in 6 categories, /vim removed |
| CLI Flags & Subcommands | 60+ flags in 8 categories, Bedrock/Vertex wizards |
| The Big 5 (Extension System) | CLAUDE.md, Rules, Commands, Skills, Subagents, MCP, Plugins |
| MCP Computer Use & Monitor | 27 desktop tools, background watchers |
| Permission Modes | 6 modes + April hardening (Bash, PowerShell, sandbox) |
| Hooks | 26 events, 5 handler types, if field, duration_ms |
| Input Superpowers | @mentions, !shell, images, pipes, worktrees, background |
| Configuration | 5-level hierarchy, 24 env vars, 12 settings.json fields |
| File Structure Map | Project + global tree (now with themes/ and plans/) |
| Rewind & Checkpoints | Rewind options + 1h prompt caching |
| Auto Mode | Permission classifier, fast+thinking paths, PermissionDenied hook |
| Models & Effort Levels | Opus 4.7, Sonnet 4.6, Haiku 4.5 + xhigh effort |
| Platforms | CLI (Linux/macOS/Windows native), redesigned Desktop, Web, IDE |
| Pro Workflow | Plan → Execute, Focus View, Monitor tool, adaptive thinking |
| Customize Claude Code | Full frontmatter for every extension type |
| Quick Reference | Combos refreshed with April additions |
Additions and changes since March 2026
Claude Opus 4.7 (April 16)
Native 1M context, 64K to 128K output tokens, and above all adaptive thinking: no more manual budget_tokens, the model itself decides when to think longer. Visible through inline indicators (“still thinking”, “thinking more”). Default effort shifts to a new xhigh level (100K tokens, 71% on MRCR v2), positioned between high and max.
Auto Mode GA for Max subscribers
The Auto mode (permission classifier) left research preview for Max subscribers with Opus 4.7. The classifier runs two paths: a fast path on Haiku that tags each tool call as safe/risky/uncertain, and a thinking path on Opus/Sonnet that handles ambiguous cases. The new PermissionDenied hook fires on denials (useful to request an explicit grant via a script) and can return {"retry": true} to rerun the tool.
Computer Use in the CLI
Computer Use was Desktop-app-only in the March release. Since v2.1.86 it is available in the CLI on macOS and Windows Desktop (Linux not supported), with multi-monitor support. The 27 tools (screenshot, clicks, typing, computer_batch, etc.) are unchanged. Still a research preview, Pro/Max only.
Monitor tool (v2.1.98)
A built-in tool that spawns background watchers: tail logs, watch CI, auto-fix crashes. Each stdout line becomes a notification in the conversation. Replaces while sleep; do ... done Bash loops. Pairs with /loop in self-pacing mode (omit the interval; Claude picks the next tick or uses Monitor).
7 new slash commands, 2 removed
Added: /ultraplan (draft in the cloud, review in the browser, execute locally), /autofix-pr (fix a PR from the terminal or web), /team-onboarding (generate a teammate ramp-up guide from your usage), /powerup (animated lessons to learn features), /tui (flicker-free fullscreen rendering), /focus (condensed view), /effort (interactive slider with ↑↓).
Removed: /vim (use /config → Editor mode) and /tag (replaced by AI-generated session titles).
Hook system updates
The listed total moves from 25 to 26 events, plus several refinements: PermissionDenied for Auto Mode refusals, PostUserPromptSubmit that can override sessionTitle, PostToolUse now receives duration_ms in its input, PreCompact can block compaction (exit 2), the if field accepts mcp__server__tool, and a new handler type mcp_tool calls an MCP tool directly.
Roughly twenty new environment variables
Among others: CLAUDE_CODE_NO_FLICKER (alt-screen rendering on by default since v2.1.89), CLAUDE_CODE_HIDE_CWD, CLAUDE_CODE_USE_MANTLE (Bedrock via Mantle), CLAUDE_CODE_CERT_STORE, CLAUDE_CODE_SUBPROCESS_ENV_SCRUB (Linux PID namespace isolation), CLAUDE_CODE_SCRIPT_CAPS, CLAUDE_CODE_PERFORCE_MODE, ENABLE_PROMPT_CACHING_1H, FORCE_PROMPT_CACHING_5M, ENABLE_TOOL_SEARCH, OTEL_LOG_TOOL_DETAILS, DISABLE_UPDATES. Seven new settings.json fields too: prUrlTemplate, sandbox.failIfUnavailable, disableSkillShellExecution, showThinkingSummaries (off in interactive mode since v2.1.86), statusLine.refreshInterval.
Redesigned Desktop app (April 14)
Multi-session sidebar, drag-and-drop pane layout, integrated terminal, file editor with HTML/PDF preview, rebuilt diff viewer. /desktop transfers a session from the CLI to the app. Computer Use also works from the Desktop app on macOS and Windows.
Claude Code on the web
claude.ai/code in research preview for Pro and Max subscribers: cloud infrastructure, persistent sessions from mobile, /teleport to resume locally.
Defaults that flipped
- Flicker-free rendering (alt-screen) on by default (v2.1.89)
- OS CA certificate store trusted by default (v2.1.101), no more manual setup for enterprise TLS proxies
- Thinking summaries off by default in interactive mode (v2.1.86)
- Default effort:
highon API-key / Bedrock / Vertex / Team / Enterprise,xhighfor Opus 4.7 users
Official sources: Claude Code Changelog, What’s New (weeks W13, W14, W15), Opus 4.7 notes, Computer Use, Auto Mode.
If you spot an error or a missing feature, please reach out. I’ll keep this cheatsheet updated as Claude Code evolves.
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